[PATCH 1/2] mm: rename copy_from_kernel_nofault_allowed() to copy_kernel_nofault_allowed()
From: Omar Sandoval <osandov@osandov.com>
Date: 2024-09-02 05:31:49
Also in:
linux-arm-kernel, linux-mips, linux-mm, linux-um, lkml, loongarch
Subsystem:
arm port, linux for powerpc (32-bit and 64-bit), loongarch, memory management, memory management - core, mips, parisc architecture, the rest, user-mode linux (uml), x86 architecture (32-bit and 64-bit), x86 mm · Maintainers:
Russell King, Madhavan Srinivasan, Michael Ellerman, Huacai Chen, Andrew Morton, David Hildenbrand, Thomas Bogendoerfer, "James E.J. Bottomley", Helge Deller, Linus Torvalds, Richard Weinberger, Anton Ivanov, Johannes Berg, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, Andy Lutomirski, Peter Zijlstra
From: Omar Sandoval <redacted> All of the existing checks are applicable to both the "from" and "to" directions, and the next patch needs it for copy_to_kernel_nofault(). Signed-off-by: Omar Sandoval <redacted> --- arch/arm/mm/fault.c | 2 +- arch/loongarch/mm/maccess.c | 2 +- arch/mips/mm/maccess.c | 2 +- arch/parisc/lib/memcpy.c | 2 +- arch/powerpc/mm/maccess.c | 2 +- arch/um/kernel/maccess.c | 2 +- arch/x86/mm/maccess.c | 4 ++-- include/linux/uaccess.h | 2 +- mm/maccess.c | 7 +++---- 9 files changed, 12 insertions(+), 13 deletions(-)
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index ab01b51de559..3fef0a59af4f 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c@@ -27,7 +27,7 @@ #ifdef CONFIG_MMU -bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) +bool copy_kernel_nofault_allowed(const void *unsafe_src, size_t size) { unsigned long addr = (unsigned long)unsafe_src;
diff --git a/arch/loongarch/mm/maccess.c b/arch/loongarch/mm/maccess.c
index 58173842c6be..70012ac0a5a8 100644
--- a/arch/loongarch/mm/maccess.c
+++ b/arch/loongarch/mm/maccess.c@@ -3,7 +3,7 @@ #include <linux/uaccess.h> #include <linux/kernel.h> -bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) +bool copy_kernel_nofault_allowed(const void *unsafe_src, size_t size) { /* highest bit set means kernel space */ return (unsigned long)unsafe_src >> (BITS_PER_LONG - 1);
diff --git a/arch/mips/mm/maccess.c b/arch/mips/mm/maccess.c
index 58173842c6be..70012ac0a5a8 100644
--- a/arch/mips/mm/maccess.c
+++ b/arch/mips/mm/maccess.c@@ -3,7 +3,7 @@ #include <linux/uaccess.h> #include <linux/kernel.h> -bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) +bool copy_kernel_nofault_allowed(const void *unsafe_src, size_t size) { /* highest bit set means kernel space */ return (unsigned long)unsafe_src >> (BITS_PER_LONG - 1);
diff --git a/arch/parisc/lib/memcpy.c b/arch/parisc/lib/memcpy.c
index 5fc0c852c84c..78758b9a0f49 100644
--- a/arch/parisc/lib/memcpy.c
+++ b/arch/parisc/lib/memcpy.c@@ -48,7 +48,7 @@ void * memcpy(void * dst,const void *src, size_t count) EXPORT_SYMBOL(memcpy); -bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) +bool copy_kernel_nofault_allowed(const void *unsafe_src, size_t size) { if ((unsigned long)unsafe_src < PAGE_SIZE) return false;
diff --git a/arch/powerpc/mm/maccess.c b/arch/powerpc/mm/maccess.c
index ea821d0ffe16..e0f4c394836c 100644
--- a/arch/powerpc/mm/maccess.c
+++ b/arch/powerpc/mm/maccess.c@@ -7,7 +7,7 @@ #include <asm/inst.h> #include <asm/ppc-opcode.h> -bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) +bool copy_kernel_nofault_allowed(const void *unsafe_src, size_t size) { return is_kernel_addr((unsigned long)unsafe_src); }
diff --git a/arch/um/kernel/maccess.c b/arch/um/kernel/maccess.c
index 8ccd56813f68..3497148e9aa5 100644
--- a/arch/um/kernel/maccess.c
+++ b/arch/um/kernel/maccess.c@@ -7,7 +7,7 @@ #include <linux/kernel.h> #include <os.h> -bool copy_from_kernel_nofault_allowed(const void *src, size_t size) +bool copy_kernel_nofault_allowed(const void *src, size_t size) { void *psrc = (void *)rounddown((unsigned long)src, PAGE_SIZE);
diff --git a/arch/x86/mm/maccess.c b/arch/x86/mm/maccess.c
index 42115ac079cf..be28eda2c0b0 100644
--- a/arch/x86/mm/maccess.c
+++ b/arch/x86/mm/maccess.c@@ -6,7 +6,7 @@ #include <asm/vsyscall.h> #ifdef CONFIG_X86_64 -bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) +bool copy_kernel_nofault_allowed(const void *unsafe_src, size_t size) { unsigned long vaddr = (unsigned long)unsafe_src;
@@ -36,7 +36,7 @@ bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) return __is_canonical_address(vaddr, boot_cpu_data.x86_virt_bits); } #else -bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) +bool copy_kernel_nofault_allowed(const void *unsafe_src, size_t size) { return (unsigned long)unsafe_src >= TASK_SIZE_MAX; }
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index d8e4105a2f21..297a02b2bd53 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h@@ -387,7 +387,7 @@ copy_struct_from_user(void *dst, size_t ksize, const void __user *src, return 0; } -bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size); +bool copy_kernel_nofault_allowed(const void *unsafe_src, size_t size); long copy_from_kernel_nofault(void *dst, const void *src, size_t size); long notrace copy_to_kernel_nofault(void *dst, const void *src, size_t size);
diff --git a/mm/maccess.c b/mm/maccess.c
index 518a25667323..72e9c03ea37f 100644
--- a/mm/maccess.c
+++ b/mm/maccess.c@@ -7,8 +7,7 @@ #include <linux/uaccess.h> #include <asm/tlb.h> -bool __weak copy_from_kernel_nofault_allowed(const void *unsafe_src, - size_t size) +bool __weak copy_kernel_nofault_allowed(const void *unsafe_src, size_t size) { return true; }
@@ -28,7 +27,7 @@ long copy_from_kernel_nofault(void *dst, const void *src, size_t size) if (!IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)) align = (unsigned long)dst | (unsigned long)src; - if (!copy_from_kernel_nofault_allowed(src, size)) + if (!copy_kernel_nofault_allowed(src, size)) return -ERANGE; pagefault_disable();
@@ -83,7 +82,7 @@ long strncpy_from_kernel_nofault(char *dst, const void *unsafe_addr, long count) if (unlikely(count <= 0)) return 0; - if (!copy_from_kernel_nofault_allowed(unsafe_addr, count)) + if (!copy_kernel_nofault_allowed(unsafe_addr, count)) return -ERANGE; pagefault_disable();
--
2.46.0